摘要
研究了25℃时Triton X-100(TX100),溴化十四烷基三甲铵(TTAB)和十二烷基硫酸钠(SDS)自其单组份水溶液及自TX100-SDS和TX100-TTAB混合水溶液在活性炭上的吸附。结果表明,三种表面活性剂自其单组份水溶液在活性炭上的吸附等温线均为Langmuir型;吸附能力以mol·g^(-1)为单位时的顺序为SDS>TTAB>TX100;在混合体系中,由于吸附质对吸附剂的竞争以及溶液体相中形成临界胶团浓度较小的混合胶团,使得离子型和非离子型表面活性剂的吸附相互抑制;混合体系中相应吸附量的关系是线性的。
The adsorption of Triton X-100(TX100), tetradecyltrimethylammonium bromide(TTAB) and sodium dodecylsulfate (SDS) from their single aqueous solutions and from TX100-SDS and TX100-TTAB mixed aqueous solutions on actiye carbon at 25· has been determined. The adsorption isotherms of the three surfactants from their single solutions are all of Langmuir type, and the order of the adsorption ability (in mol·g-1) is SDS>TTAB> TX100.Owing to the competition between the adsorbates for the adsorbent and the formation of mixed micelle (which has a lower CMC in the bulk solution), in mixed systems. the adsorptions of ionic and nonionic surfactants were restrained mutually. The relationships between the corresponding adsorption amounts for both mixed systems are linear.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1989年第6期726-733,共8页
Acta Scientiarum Naturalium Universitatis Pekinensis
关键词
表面活性剂
活性炭
混合吸附
Surfactants
Active carbon
Mixed adsorption
Triton X-100
Sodium dodecylsulfate
Tetradecyltrimethylammonium bromide
